Security Bulletin: IBM Security Access Manager Appliance is affected by Kerberos vulnerabilities (CVE-2017-11368, CVE-2017-7562)

Security Bulletin

Summary

IBM Security Access Manager Appliance has addressed the following vulnerabilities.

Vulnerability Details

CVEID: CVE-2017-11368
DESCRIPTION: MIT Kerberos 5 is vulnerable to a denial of service, caused by a KDC assertion failure. By sending a specially-crafted request, a remote authenticated attacker could exploit this vulnerability to cause memory allocation failure.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/130207 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2017-7562
DESCRIPTION: MIT krb5 could allow a remote authenticated attacker to bypass security restrictions, caused by the improper validation of a forged certificate EKU and SAN. An attacker could exploit vulnerability to gain unauthorized access to the system to impersonate arbitrary principals under rare and erroneous circumstances.
CVSS Base Score: 6.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/143332 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N)

Affected Products and Versions

Affected IBM Security Access Manager Appliance	Affected Versions
IBM Security Access Manager	9.0.3.0 - 9.0.4.0

Remediation/Fixes

Product	VRMF	APAR	Remediation
IBM Security Access Manager	9.0.3.0 - 9.0.4.0	IJ08649	Upgrade to 9.0.5.0: 9.0.5-ISS-ISAM-FP0000

Workarounds and Mitigations

None.

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Change History

20 August 2018: Original version published.

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

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Tips

Security Bulletin: IBM Security Access Manager Appliance is affected by Kerberos vulnerabilities (CVE-2017-11368, CVE-2017-7562)